Nail-machine.



No. 705,450. Patented July 22, I902.

E. SCHWABZ.

N-AIL MACHINE.

(Application filed. Mar. 22, 1902.) i .(llo Model.) I 2 Sheets-Sheet Fly;

Witnesses. mkmfmv,

a fl aymmi a; ma M$M mm No. 705,450. Patented Julv 22, I902.

E. SCHWARZ.

NAIL MACHINE.

(Application filed Mar. 22, 1902.) (No Model.) 2 Sheets-Sheet 2;-

Manor 0100; 615M. E 5 is ms cams PEI'ERS ca. vHuTouYr-la, WASHINGTON. n, c.

tion of the nail-punches.

U ITED STATE "PATENT OFFICE.

EMERIOH SCHWARZ, OF. CHICAGO, ILLINOIS.

NAILEMAQHINE.

SPECIFICATION forming part of Letters Patent No. 705,450, dated July 22, 1902. Application filed March Z Z IQOZL Serial No. 99,547. (No model.

and useful ImprovementslinNail-Machines,-

of which the following isa specification. 1 F

Thisinvention relates to machines for making horseshoe-nails and it consistsmo re particularly in the stock-feedingeppar'atiis used in'connection therewith.

stock forward the desired amount'in a positive and eflicient manner. In the accompanying drawings, illustrating this invention, Figure l is aflside view of a nail-punchin g machine with stock-feeding'de vice embodied in this invention. Fig. 2 is'Qa plan view of-the stock-feeding device. Fig. 3 is an end view of the same, showing a porthe feeding-carriage. Fig. 5 is a sectiona view taken on line 5 5 of Figi 2. 7

A represents the frame of a nail-punching machine adapted, nails.

B is the main d'riving-shaft,provided witha drive-pulley b. T

0 represents thenail-punch, which may beoperated by the main'shaft in any'well-known manner, this not being a part of the present invention.

The stock D, from which the nails are punched, is preferablya ribbon of steel having the edges somewhat thicker than the central portion. It is desirable to feedlthis stock forward automatically at each stroke of the punch a distance to correspond-withthe exact width of the nail, and for this purpose I haveprovided the feeding device shown.v

E is the feeding-carriage,which'is mounted to reciprocate in suitable wayswinthe main to punchfout horseshoeframe and is riormallyheld in a retracted poi sition'by a spring or springs e, secured to lugsein said carriage and fastened at the oppositeends to projections a on the frame.

Standards '6 on the carria e carrv a roller F b u 7 which is adapted to engage with a cam G on a counter-shaft g, mounted in hearings g on the main frame. The counter-shaftis driven Its objects are to provide a device for the purpose of feeding the stock that will be simple .in construction and durable in operation and will feed'the Fig. 14. is a detail of from the main shaft 13 by any suitable means,

such as the train of gears g g and b.

Apair of, gripping-levers h h are pivoted at h hion the feeding-carriage E. These are provided at one end with adjustable grippingjaws h h which are adapted to engage the stock andat the other side of the fulcrum with small rollers 77. 72. Aspring 71. secured totheends of th'e levers h 71, tends to hold "th'ejaws normally'away from the stock. The rollers 77. h engage with face-cams .I J on the shaft '9. These cams are cut away at j to 'allow the spring to open the jaws, but-during the remainder of the revolution press the rollers 71 h apart and cause the jaws to engage the stock.

Immediately forward of the feeding -carriage is a clamping device to prevent the "stock'fronfbeing drawn back when the carriage retracts. This consists of a pair of adjustable 'jaws K K", mounted on the main frame. One of these, K, is held rigidly, while the other,K,is pressed by a spring 7o,as shown. Next to this device is the die 0, which cooperates with the punch C to form the nails.

Theoperation of this invention is as follows'zjIheT stock beingin positionfor the punch to operate, it"..descends and'punches outthe nails. As :the punch rises the cams J J" release the rollers 71 h, thereby releasing the stock. Simultaneously the cam G allows the springs to draw the carriage back a distance corresponding to the length of stock .'to be fed. The camsJJCthen engage the rollers 71. h and spreading them apart cause the jaws to engage the stock. At the same time the cam G engages the roller F and moves the carriage forward, the jaws holding the stock until the punch operates. Then the operation is repeated.

This feedin g device may be applied to various forms of machines, and Ido not'wish to limit myinvention to the usehereindescribed orv theIe'Xact construction shown; but

What I claim, and desire to secure'by Letters Patent, is-

1. In a feeding device, the combination of a pair of pivoted levers,- stock-gripping jaws at the ends of. saidlevers, means for operating said levers to cause the jaws to engage the stock, a spring holding the jaws normally disengaged, a carriage upon which said levers are pivoted and means for reciprocating said carriage.

2. In a stock-feeding device, the combination of a reciprocating carriage, levers pivoted to said carriage provided with adjustable stock-gripping jaws at one end, rollers on said levers, a pair of cams mounted on a revolnhle shaft and adapted to engage said rollers, and means for reciprocating said carriage.

3. In a stock-feeding device, the combination of a reciprocating carriage,a spring tending to hold said carriage in a normally retracted position, standards on said carriage carrying a roller, a cam mounted on a revoluble shaft held in relatively fixed bearings and adapted to engage said roller to move the carriage forward, and stock gripping mechanism on said carriage.

4c. In a feeding device the combination of a frame, a reciprocating carriage mounted in said frame, a spring holding said carriage in a normally retracted position, a pair of levers pivotedon said frame, adjustable stockgripping jaws on said levers, rollers on said levers, a spring connecting the ends of said levers, standards on said carriage carrying a roller, a shaft mounted over said carriage in bearings on said frame, a pair of cams on said shaft engaging the rollers on said levers, a third cam on said shaft engaging said roller on the reciprocating frame, means for turning said shaft, and aspring-pressed clamp forward of said feeding apparatus adapted to engage the stock substantially as described.

EMERICH SCHWARZ.

Witnesses:

F. J oHNsMiiLLER, RosooE A. JOHNSON. 

